<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>
        <a href="/">商品管理</a>
      </el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <tree-table
        :data="tableData"
        :columns="columns"
        show-index
        border
        :selection-type="false"
        :expand-type="false"
        index-text="#"
      >
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color:lightgreen"
          ></i>
          <i class="el-icon-error" v-else style="color:red"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level===0">一级</el-tag>
          <el-tag size="mini" type="success" v-else-if="scope.row.cat_level===1">二级</el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <template slot="opt">
          <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
        </template>
      </tree-table>
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="querInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="querInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>
    <!-- 添加分类对话框 -->
    <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%" @close="addClosed">
      <!-- 添加分类表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRuleForm"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类" prop="cat_pid">
          <el-cascader
            v-model="selectedKeys"
            :options="options"
            :props="{ expandTrigger: 'hover', checkStrictly: true ,
            value: 'cat_id',label: 'cat_name',children: 'children'}"
            clearable
            @change="parentCateChange"
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      addCateDialogVisible: false,
      addCateForm: {
        // 分类名称
        cat_name: '',
        // 添加分类的父级id，0表示父级
        cat_pid: 0,
        // 添加分类的等级，0则表示添加一级分类
        cat_level: 0
      },
      // 指定级联选择器的配置对象
      options: [],
      addCateFormRules: {
        // 验证规则
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      tableData: [],
      total: 0,
      selectedKeys: [],
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ]
    }
  },
  created() {
    this.getcategoridslist()
    this.getParentCateList()
  },
  methods: {
    async getcategoridslist() {
      const { data: res } = await this.$http.get('categories', {
        params: this.querInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      // console.log(res.data.total)
      this.tableData = res.data.result
      this.total = res.data.total
    },
    // 监听 pagesize 改变的事件
    handleSizeChange(newSize) {
      // console.log(newSize)
      this.querInfo.pagesize = newSize
      this.getcategoridslist()
    },
    // 监听 页码值 改变的事件
    handleCurrentChange(newPage) {
      this.querInfo.pagenum = newPage
      this.getcategoridslist()
    },
    showAddCateDialog() {
      //  显示添加分类对话框
      this.addCateDialogVisible = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 }
      })

      if (res.meta.status !== 200) {
        return this.$message.error('获取父级分类数据失败！')
      }
      console.log(res.data, '123')
      this.options = res.data
    },
    parentCateChange() {
      console.log(this.selectedKeys)
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ]
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addClosed() {
      this.$refs.addCateFormRuleForm.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
    },
    addCate() {
      this.$refs.addCateFormRuleForm.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          'categories',
          this.addCateForm
        )

        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功')
        this.getcategoridslist()
        this.addCateDialogVisible = false
      })
    }
  }
}
</script>
<style lang="less" scoped>
.el-row {
  margin-bottom: 10px;
}
.el-cascader {
  width: 100%;
}
.treeTable {
  margin-top: 15px;
}
</style>
